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// Copyright 2024 The CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package golang defines the LSP features for navigation, analysis,
// and refactoring of Go source code.
package cuelang
import (
"bytes"
"context"
cueformat "cuelang.org/go/cue/format"
"cuelang.org/go/internal/golangorgx/gopls/cache"
"cuelang.org/go/internal/golangorgx/gopls/file"
"cuelang.org/go/internal/golangorgx/gopls/protocol"
"cuelang.org/go/internal/golangorgx/tools/diff"
"cuelang.org/go/internal/golangorgx/tools/event"
)
// FormatCUE formats a CUE file with a given range.
func FormatCUE(ctx context.Context, snapshot *cache.Snapshot, fh file.Handle) ([]protocol.TextEdit, error) {
ctx, done := event.Start(ctx, "source.FormatCUE")
defer done()
// TODO cache the parsed artefacts, which will include the mapper
src, err := fh.Content()
if err != nil {
return nil, err
}
res, err := cueformat.Source(src)
if err != nil {
// TODO fix up the AST like gopls so we can do more with
// partial/incomplete code.
//
// For now return early because there is nothing we can do.
return nil, nil
}
// If the format did nothing, do nothing
if bytes.Equal(src, res) {
return nil, nil
}
mapper := protocol.NewMapper(fh.URI(), src)
edits := diff.Strings(string(src), string(res))
return protocol.EditsFromDiffEdits(mapper, edits)
}
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